Yesterday Microsoft released a full working version of the Windows Phone SDK 8.0 for creating applications for Windows Phone 8 and Windows Phone 7.5.
The new Windows Phone SDK contains a separate release of Visual Studio Express 2012 for the OS for smartphones on the platform, respectively, Windows Phone 8. The SDK includes many emulators and additional tools for profiling and testing applications in real time. You can also use it to create machine and managed code applications.
Recall that currently the Windows Store has more than 120 thousand applications for Windows Phone 8, access to which is open in 191 states.